Atari 400 Technical Reference Manual page 430

RSCROL I Ixx xx xxi Ixxl Ixxl Ixxl Ixxl Ixxl Horizontal Scrolling
VSCROL I I xx xx Ixxlxxl 1 Ixxlxxl
I
Ixxlxxl Vertical Scrolling
LD MEM SCAN 1 I XX xxlxxlxxl 1 1 1 Ixxlxxlxxlxxl Load memory scan (3 byte)
INST INTERRUPT 1 1 IXXlxxlxxlxxlxxlxxlxxlxxl Display instruction interrupt
I I
BLK 1 001
" 2 101
" 3-7
I
80
90
" 8 70 FO
JMP 01 81
JVB 41
I
C1
CRR (40,2,8) 02 12 22 32142 52 62 72 82 92 A2 B2 C2 D2 E2 F2
" (40,2,10) 03 13 23 33 43 53 63 73 83 93 A3 B3 C3 D3 E3 F3
"(40,4,8) 04 14 24 34 44 54 64 74 84 94 A4 B4 C4 D4 E4 F4
" (40,4,16) OS 15 25 35 45 55 65 75 85 95 AS B5 C5 D5 E5 F5
"(20,5,8) 06 16 26 36 46 56 66 76 86 96 A6 B6 C6 D6 E6 F6
" (20,5,16) 07 17 27 37 47 57 67 77 87 97 A7 B7 C7 D7 E7 F7
MAP (40,4,8) 08 18 28 38 48 58 68 78 88 98 A8 B8 C8 D8 E8 F8
" (80,2,4) 109 19 29 39 49 59 69 79 89 99 A9 B9 C9 D9 E9 F9
" ( 8
° ,
4 , 4 ) lOA 1 A 2 A 3 A 4 A 5 A 6 A 7 A 8 A 9 A AA B A CAD A E A FA
"(160,2,2) lOB IB 2B 3B 4B 5B 6B 7B 8B 9B AB BB CB DB EB FB
"(160,2,1) 10C 1C 2C 3C 4C 5C 6C 7C 8C 9C AC BC CC DC EC FC
II
(160,4,2) 10D 1D 2D 3D 4D 5D 6D 7D 8D 9D AD BD CD DD ED FD
II
(160,4,1) 10E IE 2E 3E 4E 5E 6E 7E 8E 9E AE BE CE DE EE FE
II
(320,2,1) 10F IF 2F 3F 4F SF 6F 7F 8F 9F AF BF CF DF EF FFI
I I I
I 1 .... 1 _ _
I
-,-1 _ _ _
I
Number of TV lines per cell
Number of Colors (Background
+
Playfield types)
Number of Horizontal cells (standard width screen)
Figure 11.3 DISPLAY INSTRUCTION OPCODES
11.9
Blank 1 line
Blank 2 lines
Blank 3 thru 7 lines
Blank 8 lines
Jump (3 byte instruction)
Jump
&
wait for Vert. Blank
(also 3 byte)
Character Mode
Instructions
Memory Map Mode
Instructions